The Columbian Exchange affected European trade by giving more/variety of goods. They gained new foods and animals.
The correct answer to this open question is the following.
During an important time in the history of the colonies in North America, it came a time when the British owned most of the known territory in this region of the Americas. French people were more interested in maintaining the fur trade alive in order to make big profits. But the English were more interested in settling the land.
This British presence in most on the East coast territories meant more surveillance to the colonists, or at least that is how American colonists perceived it.
This represented a period of many hostilities, confrontations, and differences between the English crown and the 13 colonies. Yes, there were wars such as the Pontiac's War or the Seven Years War that increased the tensions between the colonies and the British government.
But what really upset and angered the colonists were the series of heavy taxations imposed by the English government such as the Navigation Acts, the Stamp Act, the Tea Act, the Intolerable Acts, and many more. Colonists were infuriated by these "aggravations."
And what made things worse was the fact that colonists had no voice or opinion in the British Parliament.
And what about aggressions such as the one called the Boston Massacre?
Of course, these things were major causes for the Revolutionary War of Independence.
Antonio Valencia (Manchester United)
New england and middle colonies did not believe in slavery.
